In this study undoped, Ce3+-, Eu3+- doped and Ce3+: Eu3+ and co-doped ZnO nanopowders were synthesized by the chemical bath deposition (CBD) method. The samples were annealed at 700 °C for 2 h using an open furnace. The aim in this study was to investigate the energy transfer processes between Ce3+ and Eu3+ ions into ZnO powders. The X-Ray diffraction results indicated an increase in the crystallite sizes while scanning electron microscopy shown aggregation for the Ce3+: Eu3+ co-doped ZnO nanopowders. Ultraviolet–visible spectra exhibited red and blue shift in the Ce3+-, Eu3+ doped and Ce3+: Eu3+ co-doped ZnO nanopowders, respectively. The emission peaks at 582, 617, 659 and 705 nm are attributed to Eu3+ intra-4f transitions of 5D0 →7F1 5D0 →7F2 5D0 →7F3 and 5D0 →7F4 when excited by 465, 534 and 582 nm after co-doping. The chromaticity diagram show colour co-ordination in the orange vertex.
- Band gap